Improved implement for blasting rocks



c. F. BROWN. IMPLEMENT FOR BLASTING ROCKS.

No 11,250. Patented July 11, 1854.

UNITED STATES PATENT OFFICE.

o. F. BROWN, OF WARREN, nnons ISLAND.

Specification forming part of LettcrsP-atont No. l I ,250, dated July 1'1, 1854.

.To all whomz't may concern.-

Be itknown that I, O. F. BROWN, ofNarren, in the county of Bristol and State oflthode Island, have invented a new and Improved Implement tbr'Blasting Rocks and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this speeiticatiomiu which- Figure 1 is an external view of my improved implement. Fig. 2 is a vertical section of the tube or case which contains the charge.

Similar letters of reference indicate corresponding parts in the two figures.

This invention relates to a new and useful implement for blasting rocks, and itsiQOliSlStvS in placing the powder or charge within a tube or case and between two heads provided with suitable packing and attached to a rod, said heads being also within the tube or case. I By this arrangement, as will be hereinafter shown, the charge is prevented from blowingout or obtaining vent in the direction of the line of the hole in which the tube and charge are placed, and the whole efieet of the charge is exerted against the sides of the tube or case.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and the manner in l which it is applied or used.

and its base fits snugly within thetube or case,

or the diameter of the base of the head B cor-- responds to the diameter of the bore of the {tube or case.

Dis aconical head,also constructed 'of metal, and placed loosely upon the rod B in an in verted position, the rod passing through a circular hole, (I, which is made longitudinally throughthe center of said head. (Seedo'tted lines, Fig. 2.) ()n the upper part of the rod B a screw-thread, I), is cut, and a nut, E, works thereon. (See both figures.)

F F are metallic rings, which encompass the "heads near their bases, and serve as paekin g, as will be hereinafter shown.

Gr is a piece of fuse, the lower end of which is attached to the small end of the head D, and theupper end is passed through an aperture, 0, in said head,'(see Fig. 2,) and projects a suitable distance above the tube or case A.

Theimplement is used in the following manner: The rod B is inserted within the tube or case A, the head 0 resting upon the bottom of the case or tube. The necessary amount of powder is then poured within the tube or case A, and the head I) is placed down upon it and secured at that point by the nut E, which is screwed down against the head. The space within the tube or case A between the two heads 0 D is therefore filled with powder, and the case or tube is inserted within the hole, which is drilled in the rock in the usual manner. the diameter of the hole corresponding to the diameter of the tube A. The fuse G is. to be sufficiently long to reach the top of the hole. The powder being ignited by means of the fuse, the rings F F are forced tightly between the heads and the tube or case, and effectually close the top and bottom of the case, and as the powder, when ignited, will act with equal force against each of the heads 0 D, it is evident that no'vent can be obtained in a direction in line with the hole in the rock in which the tube or case is placed, or, as commonly expressed, the charge cannot blow out, and the whole eifective force of the powder will be exerted against the sides of the tube or case and the breaking of the rock rendered certain. The heads are made of conical form, in order to deflect, and thereby diminish, the force of the powder exerted against them.

The packing F F may be formed of rings similar to the metallic packing of a piston for steam-engines. any particular form of packing. should be sufficiently thick to prevent breaking and to resist the force of the powder exerted against the two heads.

The above implement is effective, and rocks may be blasted with much greater facility than by the ordinary mode, no tamping or packing of clay being necessary to confine the powder within thehole. The implement may be usedrepea-tedly, as it cannot be projected at any great distance from the spot where used.

I do notcontine myself to. The rod B;

a nut, E, or its equivalent, the tube or case A being inserted in a hole or aperture drilled in the rock, the diameter of which corresponds to that of the tube or ca-e.

'c. F. BROWN.

Witnesses:

S. H. WALLS, JNO. W. HAMILTON. 

